we start noticing some interesting components that are not commonly used on the Arduino. One of these things are the ICSP headers. They are those six pins that stick out, organized in a two-row ...

The Arduino is an open hardware platform designed ... In addition to the ICSP, you get the pins in UART order and an I2C header. Vcc is switch selectable for 3.3 or 5volts. The reset switch ...

While Arduino may or may not be interested in incorporating ... and DebugWire are possible alternatives that connect the ICSP pins to the CH551 development board or programming via the reset ...